Is it just me or are the new houses just duct'd like crap. All these new houses with a great room at the entry and only one vent. those rooms never cool down. They bake in the summer and can't hold heat in the winter. When i go on PMs i get complaints from the home owners. Then main ducts at the air handlers rarely have dampers to control air flow for the seasons. My only suggestion to people is a expensive zoneing system being that the t-stats are always on the highest level of the home. Freezing out the basement.
I'm just saying.